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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/108365] [9/10/11/12 Regression] Wrong code with -O0
Date: Sat, 14 Jan 2023 09:23:52 +0000
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X-Bugzilla-Component: c++
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X-Bugzilla-Keywords: diagnostic, wrong-code
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D108365

Jakub Jelinek <jakub at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|[9/10/11/12/13 Regression]  |[9/10/11/12 Regression]
                   |Wrong code with -O0         |Wrong code with -O0

--- Comment #8 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed on the trunk so far.
Guess for backports we want instead a minimal change (i.e. just the
+                        && INTEGRAL_TYPE_P (TREE_TYPE (TREE_OPERAND (op0, =
0)))
and
+                        && (TYPE_PRECISION (TREE_TYPE (TREE_OPERAND (op0, =
0)))
+                            < TYPE_PRECISION (type0)))
additions for C++ FE).=